Science is one thing, wisdom is another. Science is an edged tool, with which men play like children, and cut their own fingers.

Don't believe the results of experiments until they're confirmed by theory.

The pursuit of truth in science transcends national boundaries. It takes us beyond hatred and anger and fear. It is the best of us.

If an army of monkeys were strumming on typewriters, they might write all the books in the British Museum.

But it is necessary to insist more strongly than usual that what I am putting before you is a model-the Bohr model atom-because later I shall take you to a profounder level of representation in which the electron instead of being confined to a particular locality is distributed in a sort of probability haze all over the atom.

The quest of the absolute leads into the four-dimensional world.

Electrical force is defined as something which causes motion of electrical charge; an electrical charge is something which exerts electric force.